/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.ranger.patch;

import org.apache.commons.collections.CollectionUtils;
import org.apache.commons.lang.StringUtils;
import org.apache.ranger.biz.ServiceDBStore;
import org.apache.ranger.db.RangerDaoManager;
import org.apache.ranger.db.XXServiceConfigMapDao;
import org.apache.ranger.entity.XXService;
import org.apache.ranger.entity.XXServiceConfigDef;
import org.apache.ranger.entity.XXServiceConfigMap;
import org.apache.ranger.plugin.model.RangerService;
import org.apache.ranger.service.RangerAuditFields;
import org.apache.ranger.util.CLIUtil;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

@Component
public class PatchForDefaultAuidtFilters_J10050 extends BaseLoader {
    private static final Logger logger = LoggerFactory.getLogger(PatchForDefaultAuidtFilters_J10050.class);

    @Autowired
    RangerDaoManager daoMgr;

    @Autowired
    ServiceDBStore svcStore;

    @Autowired
    RangerAuditFields<?> rangerAuditFields;

    public static void main(String[] args) {
        logger.info("main()");

        try {
            PatchForDefaultAuidtFilters_J10050 loader = (PatchForDefaultAuidtFilters_J10050) CLIUtil.getBean(PatchForDefaultAuidtFilters_J10050.class);

            loader.init();

            while (loader.isMoreToProcess()) {
                loader.load();
            }

            logger.info("Load complete. Exiting!!!");

            System.exit(0);
        } catch (Exception e) {
            logger.error("Error loading", e);

            System.exit(1);
        }
    }

    @Override
    public void init() throws Exception {
        // Do Nothing
    }

    @Override
    public void printStats() {
        logger.info("adding default audit-filters to all services");
    }

    @Override
    public void execLoad() {
        logger.info("==> PatchForDefaultAuidtFilters.execLoad()");

        try {
            addDefaultAuditFilters();
        } catch (Exception e) {
            logger.error("Error while PatchForDefaultAuidtFilters", e);

            System.exit(1);
        }

        logger.info("<== PatchForDefaultAuidtFilters.execLoad()");
    }

    private void addDefaultAuditFilters() throws Exception {
        logger.debug("==> PatchForDefaultAuidtFilters_J10050.addDefaultAuditFilters()");

        List<XXService> xxServiceList = daoMgr.getXXService().getAll();

        if (CollectionUtils.isNotEmpty(xxServiceList)) {
            logger.info("Found {} services", xxServiceList.size());

            Map<String, String> defaultAuditFiltersMap = new HashMap<>();

            for (XXService xservice : xxServiceList) {
                RangerService rangerService = svcStore.getServiceByName(xservice.getName());

                if (rangerService != null && !rangerService.getConfigs().containsKey(ServiceDBStore.RANGER_PLUGIN_AUDIT_FILTERS)) {
                    if (!defaultAuditFiltersMap.containsKey(rangerService.getType())) {
                        List<XXServiceConfigDef> svcConfDefList = daoMgr.getXXServiceConfigDef().findByServiceDefName(rangerService.getType());

                        for (XXServiceConfigDef svcConfDef : svcConfDefList) {
                            if (StringUtils.equals(svcConfDef.getName(), ServiceDBStore.RANGER_PLUGIN_AUDIT_FILTERS)) {
                                defaultAuditFiltersMap.put(rangerService.getType(), svcConfDef.getDefaultvalue());
                            }
                        }
                    }

                    if (defaultAuditFiltersMap.get(rangerService.getType()) != null) {
                        Map<String, String> configs = rangerService.getConfigs();

                        if (!configs.containsKey(ServiceDBStore.RANGER_PLUGIN_AUDIT_FILTERS)) {
                            logger.info("adding default audit-filter to service {}", rangerService.getName());

                            addDefaultAuditFilterConfig(xservice, defaultAuditFiltersMap.get(rangerService.getType()));
                        }
                    } else {
                        logger.info("No default audit-filter available for service {}. Skipped", rangerService.getName());
                    }
                }
            }
        }

        logger.info("<== PatchForDefaultAuidtFilters_J10050.addDefaultAuditFilters()");
    }

    private void addDefaultAuditFilterConfig(XXService xservice, String defaultValue) {
        logger.debug("==> PatchForDefaultAuidtFilters_J10050.addDefaultAuditFilterConfig() for service (id={})", xservice.getId());

        try {
            XXServiceConfigMapDao xConfMapDao = daoMgr.getXXServiceConfigMap();
            XXServiceConfigMap    xConfMap    = new XXServiceConfigMap();

            xConfMap = rangerAuditFields.populateAuditFields(xConfMap, xservice);

            xConfMap.setServiceId(xservice.getId());
            xConfMap.setConfigkey(ServiceDBStore.RANGER_PLUGIN_AUDIT_FILTERS);
            xConfMap.setConfigvalue(defaultValue);

            xConfMapDao.create(xConfMap);
        } catch (Exception e) {
            logger.error("default audit filters addition for service (id={}) failed!!", xservice.getId());

            throw e;
        }

        logger.debug("<== PatchForDefaultAuidtFilters_J10050.addDefaultAuditFilterConfig()");
    }
}
